Manganoan Calcite Red Fluorescent Crystal Peru Pachapaqui District Rare Mineral

Description

Rare Manganoan Calcite Crystal from Pachapaqui District, Ancash, Peru

This striking Manganoan Calcite crystal from the Pachapaqui District in Bolognesi Province, Ancash, Peru is a highly collectible mineral specimen known for its distinctive colouration and remarkable fluorescent properties. Manganoan Calcite is a manganese-bearing variety of calcite that displays a vivid red fluorescence under ultraviolet light, making it a particularly desirable specimen for mineral collectors and display cabinets.

The crystal shown in the photographs is the exact specimen you will receive, carefully chosen for its mineralogical interest and natural aesthetic qualities. Each specimen includes a Certificate of Authenticity lifetime guarantee generic card, confirming that the crystal is a genuine natural mineral specimen.

Please refer to the photographs for full sizing and scale of the specimen.

Mineral Identification – Manganoan Calcite

Manganoan Calcite is a variety of calcite (calcium carbonate, CaCO₃) that contains trace amounts of manganese (Mn²⁺) within its crystal lattice. This manganese substitution is responsible for the mineral’s characteristic pink to rose coloration and its strong red fluorescence when exposed to ultraviolet light.

Calcite crystallises in the trigonal crystal system and is one of the most widely occurring carbonate minerals on Earth. Manganoan Calcite is particularly prized because the manganese content gives it a distinctive colour not seen in typical calcite specimens.

Common features of Manganoan Calcite include:

• Soft pink to rose coloured crystal or massive formations
• Smooth rhombohedral crystal faces
• Translucent to semi-transparent crystal structure
• Bright red fluorescence under UV light caused by manganese activation

These visual properties make Manganoan Calcite specimens especially popular among mineral collectors who appreciate fluorescent minerals.

Geological Origin – Pachapaqui District, Ancash, Peru

The Pachapaqui District in the Bolognesi Province of the Ancash Region in Peru is a well-known mineral-producing area located within the Andes Mountains. This region hosts complex hydrothermal mineral deposits, where mineral-rich fluids circulated through fractures in the surrounding rock formations.

As these hydrothermal solutions cooled and reacted with surrounding carbonate rocks, minerals including calcite crystallised within veins and cavities. Trace elements such as manganese became incorporated into the calcite structure, producing the distinctive Manganoan Calcite variety.

The geology of this region is associated with polymetallic hydrothermal mineral systems, which have historically produced a wide range of collectible mineral specimens. The combination of hydrothermal activity and favourable geological conditions allows crystals to grow in open spaces within the host rock, resulting in well-formed specimens.

Crystal Habit and Visual Characteristics

Manganoan Calcite specimens can occur in a variety of crystal habits depending on the growth conditions within the mineral vein. The trigonal crystal system commonly produces rhombohedral crystals, though specimens may also occur as crystalline aggregates or crystal clusters.

Typical characteristics include:

• Rhombohedral crystal faces with defined geometric edges
• Soft pink to pale rose colouration due to manganese content
• Smooth natural cleavage planes typical of calcite
• Translucent mineral surfaces allowing internal light reflection

Under ultraviolet light, many Manganoan Calcite specimens emit a bright red fluorescence, a property caused by the manganese ions within the crystal structure interacting with UV radiation.

Fluorescence and Mineral Collecting Appeal

Fluorescent minerals are highly sought after among collectors because they display dramatic visual changes under ultraviolet illumination. Manganoan Calcite is particularly famous for its vivid red fluorescent response, which can be observed using shortwave or longwave UV light.

This property results from the manganese impurities in the crystal lattice acting as activator elements, which emit visible light when stimulated by ultraviolet radiation. The fluorescence effect adds an additional dimension to the display of this mineral specimen, making it attractive for collectors who specialise in fluorescent minerals.

Collector and Display Information

• Mineral: Manganoan Calcite
• Chemical Composition: Calcium Carbonate (CaCO₃) with manganese impurities
• Mineral Group: Carbonate minerals
• Crystal System: Trigonal
• Fluorescence: Bright red fluorescence under ultraviolet light
• Locality: Pachapaqui District, Bolognesi Province, Ancash, Peru
• Specimen Type: Natural mineral crystal specimen
• Authenticity: 100% genuine mineral specimen
• Documentation: Includes Certificate of Authenticity lifetime guarantee generic card

This rare Manganoan Calcite specimen from Peru represents a beautiful and scientifically interesting mineral example, combining elegant crystal form with notable fluorescence. It makes an excellent addition to any mineral collection, fluorescent mineral display, geological cabinet, or natural specimen display, particularly for collectors interested in distinctive carbonate minerals from classic South American localities.